Gas-pressure-regulating valve



(No Model.)

J. THOMAS.

GAS PRESSURE REGULATING VALVE.

No. 366,702. Patented July 19, 1887.

37 Ill/ l/E/V TOR 7 7? fforney I WITNESSES 3% u k Nrrno STATES JOSHUATHOMAS, or CLEVELAND, OHIO.

GAS-PRESSURE-REGULATING VALVE.-

SPECIPICATION forming part of Letters Patent No. 366,702, dated July 19,1887 Application filed April 19, i887. Serial No. 235,387.

(X0 model.)

To all 111710722, it may concern.-

Be it known that I, JOSHUA THOMAS, of Cleveland, in the county ofOuyahoga and State of Ohio, have invented certain new and usefulImprovements in Gas Pressure Regulating Valves; and I do hereby declarethe. following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use the same.

My invention relates to improvements in gas-pressure'regulating valves;and it consists in certain features of construction and in combinationof parts, hereinafter described, and pointed out in the claims.

In the accompanying drawing, the figure is a plan view, mostly insection, of an apparatus embodying my invention, a portion of the sleeveconnected with the stutfing-box and a portion of the valve-stem beingbroken away to reduce the size of the drawing.

A and A are respective sect-ions of the easing,each having a cylindricalbore, and the latter section being screwed into the former, as shown.The induction-pipe is connected with the outer or forward end ofsectionA,and the discharge-pipe is supposed to be screwed into the nozzle a ofsection A, neither of these pipes being shown. Aplug, B, is screwed intothe rear end of section A. This plug has a threaded bore for engagingthe threaded portion 0 of the valve (J. Attached to or made integralwith this plug is a sleeve, b, with a stuffing-box, I), attached to theouter end of the same. The shank c of the valvestem and the sleeve 7)should be of considerable length, so that in manipulating the valve thethreaded section 0 will not enter the stuffingbox. A hand-wheel, O, isprovided for operating the valve. The valve proper consists of a longslightly-tapering cone, substantially as shown. A sleeve, 1), is made tofit easily inside of section Aof the casing,and has a flange, D, thatfits easily in the bore of section A. The sleeve has suitable packing,d, preferably slight metallic rings, to make a tight joint and allow thesleeve to move easily endwise.

A detachable valve-seat, d, is screwed into or otherwise secured to theinner end of the sleeve D. The object of making the seat detachable isthat interchangeable seats, having respectively different-sizedopenings, may be used, according to the amount of gas that is requiredfor consumption. The sleeve D,bea ring the valve-seat, is supported asagainst end pressure of gas acting toward the valve, first,

by alight spiral spring, E. This spring at the rear end is seated on aninternal flange, e, of

- the sleeve e, the latter having an easy fitin section A of the casing.The sleeve 0 is supported by a spring F, thelatter being madeconsiderably heavierandstitfer than the spring E. The spring F is seatedon the flange g of'the sleeve G, this sleeve also having an easy fit inthe cas The sleeve G is supported by a spring,H,

ing.

made considerably heavier than the spring F.

The rear end of the spring H abuts against the inner end of the plug B.The internal area in cross-section of section A of the casing issupposed to be so much greater than the capacity of the dischargingpipethat approximately a full pressure of gas is had on the sleeve D andvalveseat d. \Vhere natural gas is used, the pressu rethereof is likelyto vary greatly on different days or at different times of the same day.instance, from the limited or extra amount of gas "used at anyparticular time. It is therefore important to have some device forregulating the supply, so that ,it may be constant under any pressure,and with such arrangement of parts that the amount of gas supplied maybe varied at the will ot'the operator. The amount of gas dischargedthrough the apparatus is regulated by adjusting the valve" in or out toreduce or enlarge the opening at the valve-seat, after which the supplyis regulated as against the variable pressure by the movable valve-seat.\Vith a light pressure of gas the valveD and attached valve-seat will bemoved rearward a short distance, thereby slightly compressing the springE. If the pressure be considerably increased, the sleeve D will beforced back until the flange D strikes the forward end of sleeve 6,after which the spring F is brought-into operation, and if the pressurebecomes so great that the sleeve 0 is brought against the sleeve 9 thespring H is made to act. By having a series ofspringsarranged asaforesaid, a great range of action of the valve-seat is had, so that theflow of gas under highor low This may arise from various causes-forpressu re may be regulated. Theoperatorat any time has only toadjust-the valve, in or out, to give the desired supply of gasforconsumption, after which no further attention is required,so long assubstantially'the sameamount of gas is 5 wanted. The bore of thevalve-seat should be large enough to admit of the maximum amount of gaswanted nndera minimum pressure, and the taper of the valve should besuch as to give substantially a full movement of the valve-seat 10before closing the opening in the latter. By having the valve-seatdetachable, differentsizes -of valves and openings in the seat may beused,

. so that the balance of the apparatus may be used where a large orasmall quantity of gas is. is consumed; A cylindrical hollow-ended valveadapted to fit into the bore of the valve-seat, such valve having a longV-shaped slit in the wall thereof, the base of such slit presentingrearward, would give, in connection with the I 20 valve-seat, agraduated opening and would 2. The combination, with a needle valve 0having a screw-threaded shank for adjusting the valve endwise, of amovable co-operating ,valve-seat made to slide endwise forward or fromthe valve, and aseries of springs for supporting the valve as againstend pressureto- 5 ward the valve, substantially'as set forth.

3. The combination, with a valve and mov-, able valve-seats,substantially as indicated, of a series of springs, respectively ofdiflerent tension,forsupporting.the valve-seatasagainst o end pressuretoward the valve, substantially as set forth.

4. The combination, with. casing, valve, valve-seat, and series ofsprings, substantially as indicated, of sleeves madeto move insidethe 5casing, said sleeves having internal flanges or seats for the respectivevalves, and said sleeves, in their engagementwith each other formingstops to limit the compression of the respective springs, substantiallyas set forth. 0

In testimony whereof -I sign this specification, in the presence of twowitnesses, this 11th day'of April, 1887.

JOSHUA THOMAS.

Witnesses:

CHAS. H. Doann, ALBERT E, LYNCH.

